Increase destroy wait timeout for JdbcLockRLITests

https://build.spring.io/browse/INT-MASTER-1493/

Author: artembilan

spring-integration-jdbc/src/test/java/org/springframework/integration/jdbc/leader/JdbcLockRegistryLeaderInitiatorTests.java

@@ -184,7 +184,7 @@ public void testLostConnection() throws InterruptedException {
 
 		destroy();
 
-		assertThat(countingPublisher.revoked.await(10, TimeUnit.SECONDS)).isTrue();
+		assertThat(countingPublisher.revoked.await(20, TimeUnit.SECONDS)).isTrue();
 
 		granted = new CountDownLatch(1);
 		countingPublisher = new CountingPublisher(granted);